1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/defaultMethods.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "gc_interface/collectedHeap.inline.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "prims/nativeLookup.hpp"
40 #include "runtime/compilationPolicy.hpp"
41 #include "runtime/fieldDescriptor.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/handles.inline.hpp"
44 #include "runtime/reflection.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/thread.inline.hpp"
47 #include "runtime/vmThread.hpp"
48
49
50 //------------------------------------------------------------------------------------------------------------------------
51 // Implementation of CallInfo
52
53
54 void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
55 int vtable_index = Method::nonvirtual_vtable_index;
56 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
57 }
58
59
60 void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index, TRAPS) {
61 // This is only called for interface methods. If the resolved_method
62 // comes from java/lang/Object, it can be the subject of a virtual call, so
63 // we should pick the vtable index from the resolved method.
64 // In that case, the caller must call set_virtual instead of set_interface.
65 assert(resolved_method->method_holder()->is_interface(), "");
66 assert(itable_index == resolved_method()->itable_index(), "");
67 set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
68 }
69
70 void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
71 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
72 assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
73 CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
74 set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
75 assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
76 }
77
78 void CallInfo::set_handle(methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS) {
79 if (resolved_method.is_null()) {
80 THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
81 }
82 KlassHandle resolved_klass = SystemDictionary::MethodHandle_klass();
83 assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
84 resolved_method->is_compiled_lambda_form(),
85 "linkMethod must return one of these");
86 int vtable_index = Method::nonvirtual_vtable_index;
87 assert(!resolved_method->has_vtable_index(), "");
88 set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
89 _resolved_appendix = resolved_appendix;
90 _resolved_method_type = resolved_method_type;
91 }
92
93 void CallInfo::set_common(KlassHandle resolved_klass,
94 KlassHandle selected_klass,
95 methodHandle resolved_method,
96 methodHandle selected_method,
97 CallKind kind,
98 int index,
99 TRAPS) {
100 assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
101 _resolved_klass = resolved_klass;
102 _selected_klass = selected_klass;
103 _resolved_method = resolved_method;
104 _selected_method = selected_method;
105 _call_kind = kind;
106 _call_index = index;
107 _resolved_appendix = Handle();
108 DEBUG_ONLY(verify()); // verify before making side effects
109
110 if (CompilationPolicy::must_be_compiled(selected_method)) {
111 // This path is unusual, mostly used by the '-Xcomp' stress test mode.
112
113 // Note: with several active threads, the must_be_compiled may be true
114 // while can_be_compiled is false; remove assert
115 // assert(CompilationPolicy::can_be_compiled(selected_method), "cannot compile");
116 if (THREAD->is_Compiler_thread()) {
117 // don't force compilation, resolve was on behalf of compiler
118 return;
119 }
120 if (selected_method->method_holder()->is_not_initialized()) {
121 // 'is_not_initialized' means not only '!is_initialized', but also that
122 // initialization has not been started yet ('!being_initialized')
123 // Do not force compilation of methods in uninitialized classes.
124 // Note that doing this would throw an assert later,
125 // in CompileBroker::compile_method.
126 // We sometimes use the link resolver to do reflective lookups
127 // even before classes are initialized.
128 return;
129 }
130 CompileBroker::compile_method(selected_method, InvocationEntryBci,
131 CompilationPolicy::policy()->initial_compile_level(),
132 methodHandle(), 0, "must_be_compiled", CHECK);
133 }
134 }
135
136 // utility query for unreflecting a method
137 CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass) {
138 Klass* resolved_method_holder = resolved_method->method_holder();
139 if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
140 resolved_klass = resolved_method_holder;
141 }
142 _resolved_klass = resolved_klass;
143 _selected_klass = resolved_klass;
144 _resolved_method = resolved_method;
145 _selected_method = resolved_method;
146 // classify:
147 CallKind kind = CallInfo::unknown_kind;
148 int index = resolved_method->vtable_index();
149 if (resolved_method->can_be_statically_bound()) {
150 kind = CallInfo::direct_call;
151 } else if (!resolved_method_holder->is_interface()) {
152 // Could be an Object method inherited into an interface, but still a vtable call.
153 kind = CallInfo::vtable_call;
154 } else if (!resolved_klass->is_interface()) {
155 // A default or miranda method. Compute the vtable index.
156 ResourceMark rm;
157 klassVtable* vt = InstanceKlass::cast(resolved_klass)->vtable();
158 index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
159 resolved_method);
160 assert(index >= 0 , "we should have valid vtable index at this point");
161
162 kind = CallInfo::vtable_call;
163 } else if (resolved_method->has_vtable_index()) {
164 // Can occur if an interface redeclares a method of Object.
165
166 #ifdef ASSERT
167 // Ensure that this is really the case.
168 KlassHandle object_klass = SystemDictionary::Object_klass();
169 Method * object_resolved_method = object_klass()->vtable()->method_at(index);
170 assert(object_resolved_method->name() == resolved_method->name(),
171 err_msg("Object and interface method names should match at vtable index %d, %s != %s",
172 index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string()));
173 assert(object_resolved_method->signature() == resolved_method->signature(),
174 err_msg("Object and interface method signatures should match at vtable index %d, %s != %s",
175 index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string()));
176 #endif // ASSERT
177
178 kind = CallInfo::vtable_call;
179 } else {
180 // A regular interface call.
181 kind = CallInfo::itable_call;
182 index = resolved_method->itable_index();
183 }
184 assert(index == Method::nonvirtual_vtable_index || index >= 0, err_msg("bad index %d", index));
185 _call_kind = kind;
186 _call_index = index;
187 _resolved_appendix = Handle();
188 DEBUG_ONLY(verify());
189 }
190
191 #ifdef ASSERT
192 void CallInfo::verify() {
193 switch (call_kind()) { // the meaning and allowed value of index depends on kind
194 case CallInfo::direct_call:
195 if (_call_index == Method::nonvirtual_vtable_index) break;
196 // else fall through to check vtable index:
197 case CallInfo::vtable_call:
198 assert(resolved_klass()->verify_vtable_index(_call_index), "");
199 break;
200 case CallInfo::itable_call:
201 assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
202 break;
203 case CallInfo::unknown_kind:
204 assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
205 break;
206 default:
207 fatal(err_msg_res("Unexpected call kind %d", call_kind()));
208 }
209 }
210 #endif //ASSERT
211
212
213
214 //------------------------------------------------------------------------------------------------------------------------
215 // Klass resolution
216
217 void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
218 if (!Reflection::verify_class_access(ref_klass(),
219 sel_klass(),
220 true)) {
221 ResourceMark rm(THREAD);
222 Exceptions::fthrow(
223 THREAD_AND_LOCATION,
224 vmSymbols::java_lang_IllegalAccessError(),
225 "tried to access class %s from class %s",
226 sel_klass->external_name(),
227 ref_klass->external_name()
228 );
229 return;
230 }
231 }
232
233 void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
234 Klass* result_oop = pool->klass_ref_at(index, CHECK);
235 result = KlassHandle(THREAD, result_oop);
236 }
237
238 //------------------------------------------------------------------------------------------------------------------------
239 // Method resolution
240 //
241 // According to JVM spec. $5.4.3c & $5.4.3d
242
243 // Look up method in klasses, including static methods
244 // Then look up local default methods
245 void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, bool checkpolymorphism, bool in_imethod_resolve, TRAPS) {
246 Method* result_oop = klass->uncached_lookup_method(name, signature);
247
248 // JDK 8, JVMS 5.4.3.4: Interface method resolution should
249 // ignore static and non-public methods of java.lang.Object,
250 // like clone, finalize, registerNatives.
251 if (in_imethod_resolve &&
252 result_oop != NULL &&
253 klass->is_interface() &&
254 (result_oop->is_static() || !result_oop->is_public()) &&
255 result_oop->method_holder() == SystemDictionary::Object_klass()) {
256 result_oop = NULL;
257 }
258
259 if (result_oop == NULL) {
260 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
261 if (default_methods != NULL) {
262 result_oop = InstanceKlass::find_method(default_methods, name, signature);
263 }
264 }
265
266 if (checkpolymorphism && EnableInvokeDynamic && result_oop != NULL) {
267 vmIntrinsics::ID iid = result_oop->intrinsic_id();
268 if (MethodHandles::is_signature_polymorphic(iid)) {
269 // Do not link directly to these. The VM must produce a synthetic one using lookup_polymorphic_method.
270 return;
271 }
272 }
273 result = methodHandle(THREAD, result_oop);
274 }
275
276 // returns first instance method
277 // Looks up method in classes, then looks up local default methods
278 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
279 Method* result_oop = klass->uncached_lookup_method(name, signature);
280 result = methodHandle(THREAD, result_oop);
281 while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) {
282 KlassHandle super_klass = KlassHandle(THREAD, result->method_holder()->super());
283 result = methodHandle(THREAD, super_klass->uncached_lookup_method(name, signature));
284 }
285
286 if (result.is_null()) {
287 Array<Method*>* default_methods = InstanceKlass::cast(klass())->default_methods();
288 if (default_methods != NULL) {
289 result = methodHandle(InstanceKlass::find_method(default_methods, name, signature));
290 assert(result.is_null() || !result->is_static(), "static defaults not allowed");
291 }
292 }
293 }
294
295 int LinkResolver::vtable_index_of_interface_method(KlassHandle klass,
296 methodHandle resolved_method) {
297
298 int vtable_index = Method::invalid_vtable_index;
299 Symbol* name = resolved_method->name();
300 Symbol* signature = resolved_method->signature();
301
302 // First check in default method array
303 if (!resolved_method->is_abstract() &&
304 (InstanceKlass::cast(klass())->default_methods() != NULL)) {
305 int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), name, signature);
306 if (index >= 0 ) {
307 vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index);
308 }
309 }
310 if (vtable_index == Method::invalid_vtable_index) {
311 // get vtable_index for miranda methods
312 ResourceMark rm;
313 klassVtable *vt = InstanceKlass::cast(klass())->vtable();
314 vtable_index = vt->index_of_miranda(name, signature);
315 }
316 return vtable_index;
317 }
318
319 void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
320 InstanceKlass *ik = InstanceKlass::cast(klass());
321
322 // Specify 'true' in order to skip default methods when searching the
323 // interfaces. Function lookup_method_in_klasses() already looked for
324 // the method in the default methods table.
325 result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name, signature, true));
326 }
327
328 void LinkResolver::lookup_polymorphic_method(methodHandle& result,
329 KlassHandle klass, Symbol* name, Symbol* full_signature,
330 KlassHandle current_klass,
331 Handle *appendix_result_or_null,
332 Handle *method_type_result,
333 TRAPS) {
334 vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
335 if (TraceMethodHandles) {
336 ResourceMark rm(THREAD);
337 tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
338 vmIntrinsics::name_at(iid), klass->external_name(),
339 name->as_C_string(), full_signature->as_C_string());
340 }
341 if (EnableInvokeDynamic &&
342 klass() == SystemDictionary::MethodHandle_klass() &&
343 iid != vmIntrinsics::_none) {
344 if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
345 // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
346 // Do not erase last argument type (MemberName) if it is a static linkTo method.
347 bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
348 TempNewSymbol basic_signature =
349 MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK);
350 if (TraceMethodHandles) {
351 ResourceMark rm(THREAD);
352 tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
353 name->as_C_string(),
354 full_signature->as_C_string(),
355 basic_signature->as_C_string());
356 }
357 result = SystemDictionary::find_method_handle_intrinsic(iid,
358 basic_signature,
359 CHECK);
360 if (result.not_null()) {
361 assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
362 assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
363 assert(basic_signature == result->signature(), "predict the result signature");
364 if (TraceMethodHandles) {
365 tty->print("lookup_polymorphic_method => intrinsic ");
366 result->print_on(tty);
367 }
368 return;
369 }
370 } else if (iid == vmIntrinsics::_invokeGeneric
371 && !THREAD->is_Compiler_thread()
372 && appendix_result_or_null != NULL) {
373 // This is a method with type-checking semantics.
374 // We will ask Java code to spin an adapter method for it.
375 if (!MethodHandles::enabled()) {
376 // Make sure the Java part of the runtime has been booted up.
377 Klass* natives = SystemDictionary::MethodHandleNatives_klass();
378 if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
379 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
380 Handle(),
381 Handle(),
382 true,
383 CHECK);
384 }
385 }
386
387 Handle appendix;
388 Handle method_type;
389 result = SystemDictionary::find_method_handle_invoker(name,
390 full_signature,
391 current_klass,
392 &appendix,
393 &method_type,
394 CHECK);
395 if (TraceMethodHandles) {
396 tty->print("lookup_polymorphic_method => (via Java) ");
397 result->print_on(tty);
398 tty->print(" lookup_polymorphic_method => appendix = ");
399 if (appendix.is_null()) tty->print_cr("(none)");
400 else appendix->print_on(tty);
401 }
402 if (result.not_null()) {
403 #ifdef ASSERT
404 ResourceMark rm(THREAD);
405
406 TempNewSymbol basic_signature =
407 MethodHandles::lookup_basic_type_signature(full_signature, CHECK);
408 int actual_size_of_params = result->size_of_parameters();
409 int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
410 // +1 for MethodHandle.this, +1 for trailing MethodType
411 if (!MethodHandles::is_signature_polymorphic_static(iid)) expected_size_of_params += 1;
412 if (appendix.not_null()) expected_size_of_params += 1;
413 if (actual_size_of_params != expected_size_of_params) {
414 tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
415 tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
416 result->print();
417 }
418 assert(actual_size_of_params == expected_size_of_params,
419 err_msg("%d != %d", actual_size_of_params, expected_size_of_params));
420 #endif //ASSERT
421
422 assert(appendix_result_or_null != NULL, "");
423 (*appendix_result_or_null) = appendix;
424 (*method_type_result) = method_type;
425 return;
426 }
427 }
428 }
429 }
430
431 void LinkResolver::check_method_accessability(KlassHandle ref_klass,
432 KlassHandle resolved_klass,
433 KlassHandle sel_klass,
434 methodHandle sel_method,
435 TRAPS) {
436
437 AccessFlags flags = sel_method->access_flags();
438
439 // Special case: arrays always override "clone". JVMS 2.15.
440 // If the resolved klass is an array class, and the declaring class
441 // is java.lang.Object and the method is "clone", set the flags
442 // to public.
443 //
444 // We'll check for the method name first, as that's most likely
445 // to be false (so we'll short-circuit out of these tests).
446 if (sel_method->name() == vmSymbols::clone_name() &&
447 sel_klass() == SystemDictionary::Object_klass() &&
448 resolved_klass->oop_is_array()) {
449 // We need to change "protected" to "public".
450 assert(flags.is_protected(), "clone not protected?");
451 jint new_flags = flags.as_int();
452 new_flags = new_flags & (~JVM_ACC_PROTECTED);
453 new_flags = new_flags | JVM_ACC_PUBLIC;
454 flags.set_flags(new_flags);
455 }
456 // assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");
457
458 if (!Reflection::verify_field_access(ref_klass(),
459 resolved_klass(),
460 sel_klass(),
461 flags,
462 true)) {
463 ResourceMark rm(THREAD);
464 Exceptions::fthrow(
465 THREAD_AND_LOCATION,
466 vmSymbols::java_lang_IllegalAccessError(),
467 "tried to access method %s.%s%s from class %s",
468 sel_klass->external_name(),
469 sel_method->name()->as_C_string(),
470 sel_method->signature()->as_C_string(),
471 ref_klass->external_name()
472 );
473 return;
474 }
475 }
476
477 void LinkResolver::resolve_method_statically(methodHandle& resolved_method, KlassHandle& resolved_klass,
478 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS) {
479 // This method is used only
480 // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
481 // and
482 // (2) in Bytecode_invoke::static_target
483 // It appears to fail when applied to an invokeinterface call site.
484 // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
485 // resolve klass
486 if (code == Bytecodes::_invokedynamic) {
487 resolved_klass = SystemDictionary::MethodHandle_klass();
488 Symbol* method_name = vmSymbols::invoke_name();
489 Symbol* method_signature = pool->signature_ref_at(index);
490 KlassHandle current_klass(THREAD, pool->pool_holder());
491 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
492 return;
493 }
494
495 resolve_klass(resolved_klass, pool, index, CHECK);
496
497 Symbol* method_name = pool->name_ref_at(index);
498 Symbol* method_signature = pool->signature_ref_at(index);
499 KlassHandle current_klass(THREAD, pool->pool_holder());
500
501 if (pool->has_preresolution()
502 || (resolved_klass() == SystemDictionary::MethodHandle_klass() &&
503 MethodHandles::is_signature_polymorphic_name(resolved_klass(), method_name))) {
504 Method* result_oop = ConstantPool::method_at_if_loaded(pool, index);
505 if (result_oop != NULL) {
506 resolved_method = methodHandle(THREAD, result_oop);
507 return;
508 }
509 }
510
511 if (code == Bytecodes::_invokeinterface) {
512 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
513 } else if (code == Bytecodes::_invokevirtual) {
514 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
515 } else if (!resolved_klass->is_interface()) {
516 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, false, CHECK);
517 } else {
518 bool nostatics = (code == Bytecodes::_invokestatic) ? false : true;
519 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, nostatics, CHECK);
520 }
521 }
522
523 void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
524 Symbol* method_name, Symbol* method_signature,
525 KlassHandle current_klass, bool check_access,
526 bool require_methodref, TRAPS) {
527
528 Handle nested_exception;
529
530 // 1. check if methodref required, that resolved_klass is not interfacemethodref
531 if (require_methodref && resolved_klass->is_interface()) {
532 ResourceMark rm(THREAD);
533 char buf[200];
534 jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
535 resolved_klass()->external_name());
536 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
537 }
538
539 // 2. lookup method in resolved klass and its super klasses
540 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, true, false, CHECK);
541
542 if (resolved_method.is_null()) { // not found in the class hierarchy
543 // 3. lookup method in all the interfaces implemented by the resolved klass
544 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
545
546 if (resolved_method.is_null()) {
547 // JSR 292: see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
548 lookup_polymorphic_method(resolved_method, resolved_klass, method_name, method_signature,
549 current_klass, (Handle*)NULL, (Handle*)NULL, THREAD);
550 if (HAS_PENDING_EXCEPTION) {
551 nested_exception = Handle(THREAD, PENDING_EXCEPTION);
552 CLEAR_PENDING_EXCEPTION;
553 }
554 }
555
556 if (resolved_method.is_null()) {
557 // 4. method lookup failed
558 ResourceMark rm(THREAD);
559 THROW_MSG_CAUSE(vmSymbols::java_lang_NoSuchMethodError(),
560 Method::name_and_sig_as_C_string(resolved_klass(),
561 method_name,
562 method_signature),
563 nested_exception);
564 }
565 }
566
567 // 5. access checks, access checking may be turned off when calling from within the VM.
568 if (check_access) {
569 assert(current_klass.not_null() , "current_klass should not be null");
570
571 // check if method can be accessed by the referring class
572 check_method_accessability(current_klass,
573 resolved_klass,
574 KlassHandle(THREAD, resolved_method->method_holder()),
575 resolved_method,
576 CHECK);
577
578 // check loader constraints
579 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
580 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
581 {
582 ResourceMark rm(THREAD);
583 Symbol* failed_type_symbol =
584 SystemDictionary::check_signature_loaders(method_signature, loader,
585 class_loader, true, CHECK);
586 if (failed_type_symbol != NULL) {
587 const char* msg = "loader constraint violation: when resolving method"
588 " \"%s\" the class loader (instance of %s) of the current class, %s,"
589 " and the class loader (instance of %s) for the method's defining class, %s, have"
590 " different Class objects for the type %s used in the signature";
591 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
592 const char* loader1 = SystemDictionary::loader_name(loader());
593 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
594 const char* loader2 = SystemDictionary::loader_name(class_loader());
595 char* target = InstanceKlass::cast(resolved_method->method_holder())
596 ->name()->as_C_string();
597 char* failed_type_name = failed_type_symbol->as_C_string();
598 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
599 strlen(current) + strlen(loader2) + strlen(target) +
600 strlen(failed_type_name) + 1;
601 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
602 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
603 target, failed_type_name);
604 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
605 }
606 }
607 }
608 }
609
610 void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
611 KlassHandle resolved_klass,
612 Symbol* method_name,
613 Symbol* method_signature,
614 KlassHandle current_klass,
615 bool check_access,
616 bool nostatics, TRAPS) {
617
618 // check if klass is interface
619 if (!resolved_klass->is_interface()) {
620 ResourceMark rm(THREAD);
621 char buf[200];
622 jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass()->external_name());
623 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
624 }
625
626 // lookup method in this interface or its super, java.lang.Object
627 // JDK8: also look for static methods
628 lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, false, true, CHECK);
629
630 if (resolved_method.is_null()) {
631 // lookup method in all the super-interfaces
632 lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
633 if (resolved_method.is_null()) {
634 // no method found
635 ResourceMark rm(THREAD);
636 THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
637 Method::name_and_sig_as_C_string(resolved_klass(),
638 method_name,
639 method_signature));
640 }
641 }
642
643 if (check_access) {
644 // JDK8 adds non-public interface methods, and accessability check requirement
645 assert(current_klass.not_null() , "current_klass should not be null");
646
647 // check if method can be accessed by the referring class
648 check_method_accessability(current_klass,
649 resolved_klass,
650 KlassHandle(THREAD, resolved_method->method_holder()),
651 resolved_method,
652 CHECK);
653
654 HandleMark hm(THREAD);
655 Handle loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
656 Handle class_loader (THREAD, resolved_method->method_holder()->class_loader());
657 {
658 ResourceMark rm(THREAD);
659 Symbol* failed_type_symbol =
660 SystemDictionary::check_signature_loaders(method_signature, loader,
661 class_loader, true, CHECK);
662 if (failed_type_symbol != NULL) {
663 const char* msg = "loader constraint violation: when resolving "
664 "interface method \"%s\" the class loader (instance of %s) of the "
665 "current class, %s, and the class loader (instance of %s) for "
666 "the method's defining class, %s, have different Class objects for the type %s "
667 "used in the signature";
668 char* sig = Method::name_and_sig_as_C_string(resolved_klass(),method_name,method_signature);
669 const char* loader1 = SystemDictionary::loader_name(loader());
670 char* current = InstanceKlass::cast(current_klass())->name()->as_C_string();
671 const char* loader2 = SystemDictionary::loader_name(class_loader());
672 char* target = InstanceKlass::cast(resolved_method->method_holder())
673 ->name()->as_C_string();
674 char* failed_type_name = failed_type_symbol->as_C_string();
675 size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
676 strlen(current) + strlen(loader2) + strlen(target) +
677 strlen(failed_type_name) + 1;
678 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
679 jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
680 target, failed_type_name);
681 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
682 }
683 }
684 }
685
686 if (nostatics && resolved_method->is_static()) {
687 ResourceMark rm(THREAD);
688 char buf[200];
689 jio_snprintf(buf, sizeof(buf), "Expected instance not static method %s",
690 Method::name_and_sig_as_C_string(resolved_klass(),
691 resolved_method->name(), resolved_method->signature()));
692 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
693 }
694
695 if (TraceItables && Verbose) {
696 ResourceMark rm(THREAD);
697 tty->print("invokeinterface resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
698 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
699 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
700 Method::name_and_sig_as_C_string(resolved_klass(),
701 resolved_method->name(),
702 resolved_method->signature()),
703 resolved_method->method_holder()->internal_name()
704 );
705 resolved_method->access_flags().print_on(tty);
706 if (resolved_method->is_default_method()) {
707 tty->print("default ");
708 }
709 if (resolved_method->is_overpass()) {
710 tty->print("overpass");
711 }
712 tty->cr();
713 }
714 }
715
716 //------------------------------------------------------------------------------------------------------------------------
717 // Field resolution
718
719 void LinkResolver::check_field_accessability(KlassHandle ref_klass,
720 KlassHandle resolved_klass,
721 KlassHandle sel_klass,
722 fieldDescriptor& fd,
723 TRAPS) {
724 if (!Reflection::verify_field_access(ref_klass(),
725 resolved_klass(),
726 sel_klass(),
727 fd.access_flags(),
728 true)) {
729 ResourceMark rm(THREAD);
730 Exceptions::fthrow(
731 THREAD_AND_LOCATION,
732 vmSymbols::java_lang_IllegalAccessError(),
733 "tried to access field %s.%s from class %s",
734 sel_klass->external_name(),
735 fd.name()->as_C_string(),
736 ref_klass->external_name()
737 );
738 return;
739 }
740 }
741
742 void LinkResolver::resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
743 // Load these early in case the resolve of the containing klass fails
744 Symbol* field = pool->name_ref_at(index);
745 Symbol* sig = pool->signature_ref_at(index);
746
747 // resolve specified klass
748 KlassHandle resolved_klass;
749 resolve_klass(resolved_klass, pool, index, CHECK);
750
751 KlassHandle current_klass(THREAD, pool->pool_holder());
752 resolve_field(result, resolved_klass, field, sig, current_klass, byte, true, true, CHECK);
753 }
754
755 void LinkResolver::resolve_field(fieldDescriptor& fd, KlassHandle resolved_klass, Symbol* field, Symbol* sig,
756 KlassHandle current_klass, Bytecodes::Code byte, bool check_access, bool initialize_class,
757 TRAPS) {
758 assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
759 byte == Bytecodes::_getfield || byte == Bytecodes::_putfield ||
760 (byte == Bytecodes::_nop && !check_access), "bad field access bytecode");
761
762 bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
763 bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
764
765 // Check if there's a resolved klass containing the field
766 if (resolved_klass.is_null()) {
767 ResourceMark rm(THREAD);
768 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
769 }
770
771 // Resolve instance field
772 KlassHandle sel_klass(THREAD, InstanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
773 // check if field exists; i.e., if a klass containing the field def has been selected
774 if (sel_klass.is_null()) {
775 ResourceMark rm(THREAD);
776 THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
777 }
778
779 if (!check_access)
780 // Access checking may be turned off when calling from within the VM.
781 return;
782
783 // check access
784 check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);
785
786 // check for errors
787 if (is_static != fd.is_static()) {
788 ResourceMark rm(THREAD);
789 char msg[200];
790 jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass()->external_name(), fd.name()->as_C_string());
791 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
792 }
793
794 // Final fields can only be accessed from its own class.
795 if (is_put && fd.access_flags().is_final() && sel_klass() != current_klass()) {
796 THROW(vmSymbols::java_lang_IllegalAccessError());
797 }
798
799 // initialize resolved_klass if necessary
800 // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
801 // according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
802 //
803 // note 2: we don't want to force initialization if we are just checking
804 // if the field access is legal; e.g., during compilation
805 if (is_static && initialize_class) {
806 sel_klass->initialize(CHECK);
807 }
808
809 if (sel_klass() != current_klass()) {
810 HandleMark hm(THREAD);
811 Handle ref_loader (THREAD, InstanceKlass::cast(current_klass())->class_loader());
812 Handle sel_loader (THREAD, InstanceKlass::cast(sel_klass())->class_loader());
813 {
814 ResourceMark rm(THREAD);
815 Symbol* failed_type_symbol =
816 SystemDictionary::check_signature_loaders(sig,
817 ref_loader, sel_loader,
818 false,
819 CHECK);
820 if (failed_type_symbol != NULL) {
821 const char* msg = "loader constraint violation: when resolving field"
822 " \"%s\" the class loader (instance of %s) of the referring class, "
823 "%s, and the class loader (instance of %s) for the field's resolved "
824 "type, %s, have different Class objects for that type";
825 char* field_name = field->as_C_string();
826 const char* loader1 = SystemDictionary::loader_name(ref_loader());
827 char* sel = InstanceKlass::cast(sel_klass())->name()->as_C_string();
828 const char* loader2 = SystemDictionary::loader_name(sel_loader());
829 char* failed_type_name = failed_type_symbol->as_C_string();
830 size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
831 strlen(sel) + strlen(loader2) + strlen(failed_type_name) + 1;
832 char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
833 jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
834 failed_type_name);
835 THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
836 }
837 }
838 }
839
840 // return information. note that the klass is set to the actual klass containing the
841 // field, otherwise access of static fields in superclasses will not work.
842 }
843
844
845 //------------------------------------------------------------------------------------------------------------------------
846 // Invoke resolution
847 //
848 // Naming conventions:
849 //
850 // resolved_method the specified method (i.e., static receiver specified via constant pool index)
851 // sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
852 // resolved_klass the specified klass (i.e., specified via constant pool index)
853 // recv_klass the receiver klass
854
855
856 void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name,
857 Symbol* method_signature, KlassHandle current_klass,
858 bool check_access, bool initialize_class, TRAPS) {
859 methodHandle resolved_method;
860 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
861 resolved_klass = KlassHandle(THREAD, resolved_method->method_holder());
862
863 // Initialize klass (this should only happen if everything is ok)
864 if (initialize_class && resolved_klass->should_be_initialized()) {
865 resolved_klass->initialize(CHECK);
866 linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
867 }
868
869 // setup result
870 result.set_static(resolved_klass, resolved_method, CHECK);
871 }
872
873 // throws linktime exceptions
874 void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
875 Symbol* method_name, Symbol* method_signature,
876 KlassHandle current_klass, bool check_access, TRAPS) {
877
878 if (!resolved_klass->is_interface()) {
879 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
880 } else {
881 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
882 }
883 assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
884
885 // check if static
886 if (!resolved_method->is_static()) {
887 ResourceMark rm(THREAD);
888 char buf[200];
889 jio_snprintf(buf, sizeof(buf), "Expected static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
890 resolved_method->name(),
891 resolved_method->signature()));
892 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
893 }
894 }
895
896
897 void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, Symbol* method_name,
898 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
899 methodHandle resolved_method;
900 linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
901 runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
902 }
903
904 // throws linktime exceptions
905 void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
906 Symbol* method_name, Symbol* method_signature,
907 KlassHandle current_klass, bool check_access, TRAPS) {
908
909 // Invokespecial is called for multiple special reasons:
910 // <init>
911 // local private method invocation, for classes and interfaces
912 // superclass.method, which can also resolve to a default method
913 // and the selected method is recalculated relative to the direct superclass
914 // superinterface.method, which explicitly does not check shadowing
915
916 if (!resolved_klass->is_interface()) {
917 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, false, CHECK);
918 } else {
919 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
920 }
921
922 // check if method name is <init>, that it is found in same klass as static type
923 if (resolved_method->name() == vmSymbols::object_initializer_name() &&
924 resolved_method->method_holder() != resolved_klass()) {
925 ResourceMark rm(THREAD);
926 Exceptions::fthrow(
927 THREAD_AND_LOCATION,
928 vmSymbols::java_lang_NoSuchMethodError(),
929 "%s: method %s%s not found",
930 resolved_klass->external_name(),
931 resolved_method->name()->as_C_string(),
932 resolved_method->signature()->as_C_string()
933 );
934 return;
935 }
936
937 // check if invokespecial's interface method reference is in an indirect superinterface
938 if (!current_klass.is_null() && resolved_klass->is_interface()) {
939 Klass *klass_to_check = !InstanceKlass::cast(current_klass())->is_anonymous() ?
940 current_klass() :
941 InstanceKlass::cast(current_klass())->host_klass();
942 // As of the fix for 4486457 we disable verification for all of the
943 // dynamically-generated bytecodes associated with the 1.4
944 // reflection implementation, not just those associated with
945 // sun/reflect/SerializationConstructorAccessor.
946 bool is_reflect = JDK_Version::is_gte_jdk14x_version() &&
947 UseNewReflection &&
948 klass_to_check->is_subclass_of(
949 SystemDictionary::reflect_MagicAccessorImpl_klass());
950
951 if (!is_reflect &&
952 !InstanceKlass::cast(klass_to_check)->is_same_or_direct_interface(resolved_klass())) {
953 ResourceMark rm(THREAD);
954 char buf[200];
955 jio_snprintf(buf, sizeof(buf),
956 "Interface method reference: %s, is in an indirect superinterface of %s",
957 Method::name_and_sig_as_C_string(resolved_klass(),
958 resolved_method->name(),
959 resolved_method->signature()),
960 current_klass->external_name());
961 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
962 }
963 }
964
965 // check if not static
966 if (resolved_method->is_static()) {
967 ResourceMark rm(THREAD);
968 char buf[200];
969 jio_snprintf(buf, sizeof(buf),
970 "Expecting non-static method %s",
971 Method::name_and_sig_as_C_string(resolved_klass(),
972 resolved_method->name(),
973 resolved_method->signature()));
974 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
975 }
976
977 if (TraceItables && Verbose) {
978 ResourceMark rm(THREAD);
979 tty->print("invokespecial resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
980 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
981 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
982 Method::name_and_sig_as_C_string(resolved_klass(),
983 resolved_method->name(),
984 resolved_method->signature()),
985 resolved_method->method_holder()->internal_name()
986 );
987 resolved_method->access_flags().print_on(tty);
988 if (resolved_method->is_default_method()) {
989 tty->print("default ");
990 }
991 if (resolved_method->is_overpass()) {
992 tty->print("overpass");
993 }
994 tty->cr();
995 }
996 }
997
998 // throws runtime exceptions
999 void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1000 KlassHandle current_klass, bool check_access, TRAPS) {
1001
1002 // resolved method is selected method unless we have an old-style lookup
1003 // for a superclass method
1004 // Invokespecial for a superinterface, resolved method is selected method,
1005 // no checks for shadowing
1006 methodHandle sel_method(THREAD, resolved_method());
1007
1008 // check if this is an old-style super call and do a new lookup if so
1009 { KlassHandle method_klass = KlassHandle(THREAD,
1010 resolved_method->method_holder());
1011
1012 if (check_access &&
1013 // a) check if ACC_SUPER flag is set for the current class
1014 (current_klass->is_super() || !AllowNonVirtualCalls) &&
1015 // b) check if the class of the resolved_klass is a superclass
1016 // (not supertype in order to exclude interface classes) of the current class.
1017 // This check is not performed for super.invoke for interface methods
1018 // in super interfaces.
1019 current_klass->is_subclass_of(resolved_klass()) &&
1020 current_klass() != resolved_klass() &&
1021 // c) check if the method is not <init>
1022 resolved_method->name() != vmSymbols::object_initializer_name()) {
1023 // Lookup super method
1024 KlassHandle super_klass(THREAD, current_klass->super());
1025 lookup_instance_method_in_klasses(sel_method, super_klass,
1026 resolved_method->name(),
1027 resolved_method->signature(), CHECK);
1028 // check if found
1029 if (sel_method.is_null()) {
1030 ResourceMark rm(THREAD);
1031 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1032 Method::name_and_sig_as_C_string(resolved_klass(),
1033 resolved_method->name(),
1034 resolved_method->signature()));
1035 }
1036 }
1037 }
1038
1039 // check if not static
1040 if (sel_method->is_static()) {
1041 ResourceMark rm(THREAD);
1042 char buf[200];
1043 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1044 resolved_method->name(),
1045 resolved_method->signature()));
1046 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1047 }
1048
1049 // check if abstract
1050 if (sel_method->is_abstract()) {
1051 ResourceMark rm(THREAD);
1052 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1053 Method::name_and_sig_as_C_string(resolved_klass(),
1054 sel_method->name(),
1055 sel_method->signature()));
1056 }
1057
1058 if (TraceItables && Verbose) {
1059 ResourceMark rm(THREAD);
1060 tty->print("invokespecial selected method: resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1061 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1062 Method::name_and_sig_as_C_string(resolved_klass(),
1063 sel_method->name(),
1064 sel_method->signature()),
1065 sel_method->method_holder()->internal_name()
1066 );
1067 sel_method->access_flags().print_on(tty);
1068 if (sel_method->is_default_method()) {
1069 tty->print("default ");
1070 }
1071 if (sel_method->is_overpass()) {
1072 tty->print("overpass");
1073 }
1074 tty->cr();
1075 }
1076
1077 // setup result
1078 result.set_static(resolved_klass, sel_method, CHECK);
1079 }
1080
1081 void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
1082 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1083 bool check_access, bool check_null_and_abstract, TRAPS) {
1084 methodHandle resolved_method;
1085 linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1086 runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
1087 }
1088
1089 // throws linktime exceptions
1090 void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
1091 Symbol* method_name, Symbol* method_signature,
1092 KlassHandle current_klass, bool check_access, TRAPS) {
1093 // normal method resolution
1094 resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
1095
1096 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1097 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1098
1099 // check if private interface method
1100 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1101 ResourceMark rm(THREAD);
1102 char buf[200];
1103 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokevirtual: method %s, caller-class:%s",
1104 Method::name_and_sig_as_C_string(resolved_klass(),
1105 resolved_method->name(),
1106 resolved_method->signature()),
1107 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()));
1108 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1109 }
1110
1111 // check if not static
1112 if (resolved_method->is_static()) {
1113 ResourceMark rm(THREAD);
1114 char buf[200];
1115 jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", Method::name_and_sig_as_C_string(resolved_klass(),
1116 resolved_method->name(),
1117 resolved_method->signature()));
1118 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1119 }
1120
1121 if (PrintVtables && Verbose) {
1122 ResourceMark rm(THREAD);
1123 tty->print("invokevirtual resolved method: caller-class:%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
1124 (current_klass.is_null() ? "<NULL>" : current_klass->internal_name()),
1125 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1126 Method::name_and_sig_as_C_string(resolved_klass(),
1127 resolved_method->name(),
1128 resolved_method->signature()),
1129 resolved_method->method_holder()->internal_name()
1130 );
1131 resolved_method->access_flags().print_on(tty);
1132 if (resolved_method->is_default_method()) {
1133 tty->print("default ");
1134 }
1135 if (resolved_method->is_overpass()) {
1136 tty->print("overpass");
1137 }
1138 tty->cr();
1139 }
1140 }
1141
1142 // throws runtime exceptions
1143 void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
1144 methodHandle resolved_method,
1145 KlassHandle resolved_klass,
1146 Handle recv,
1147 KlassHandle recv_klass,
1148 bool check_null_and_abstract,
1149 TRAPS) {
1150
1151 // setup default return values
1152 int vtable_index = Method::invalid_vtable_index;
1153 methodHandle selected_method;
1154
1155 assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
1156
1157 // runtime method resolution
1158 if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
1159 THROW(vmSymbols::java_lang_NullPointerException());
1160 }
1161
1162 // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
1163 // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
1164 // a missing receiver might result in a bogus lookup.
1165 assert(resolved_method->method_holder()->is_linked(), "must be linked");
1166
1167 // do lookup based on receiver klass using the vtable index
1168 if (resolved_method->method_holder()->is_interface()) { // miranda method
1169 vtable_index = vtable_index_of_interface_method(resolved_klass,
1170 resolved_method);
1171 assert(vtable_index >= 0 , "we should have valid vtable index at this point");
1172
1173 InstanceKlass* inst = InstanceKlass::cast(recv_klass());
1174 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1175 } else {
1176 // at this point we are sure that resolved_method is virtual and not
1177 // a miranda method; therefore, it must have a valid vtable index.
1178 assert(!resolved_method->has_itable_index(), "");
1179 vtable_index = resolved_method->vtable_index();
1180 // We could get a negative vtable_index for final methods,
1181 // because as an optimization they are they are never put in the vtable,
1182 // unless they override an existing method.
1183 // If we do get a negative, it means the resolved method is the the selected
1184 // method, and it can never be changed by an override.
1185 if (vtable_index == Method::nonvirtual_vtable_index) {
1186 assert(resolved_method->can_be_statically_bound(), "cannot override this method");
1187 selected_method = resolved_method;
1188 } else {
1189 // recv_klass might be an arrayKlassOop but all vtables start at
1190 // the same place. The cast is to avoid virtual call and assertion.
1191 InstanceKlass* inst = (InstanceKlass*)recv_klass();
1192 selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
1193 }
1194 }
1195
1196 // check if method exists
1197 if (selected_method.is_null()) {
1198 ResourceMark rm(THREAD);
1199 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1200 Method::name_and_sig_as_C_string(resolved_klass(),
1201 resolved_method->name(),
1202 resolved_method->signature()));
1203 }
1204
1205 // check if abstract
1206 if (check_null_and_abstract && selected_method->is_abstract()) {
1207 ResourceMark rm(THREAD);
1208 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1209 Method::name_and_sig_as_C_string(resolved_klass(),
1210 selected_method->name(),
1211 selected_method->signature()));
1212 }
1213
1214 if (PrintVtables && Verbose) {
1215 ResourceMark rm(THREAD);
1216 tty->print("invokevirtual selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, vtable_index:%d, access_flags: ",
1217 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1218 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1219 Method::name_and_sig_as_C_string(resolved_klass(),
1220 resolved_method->name(),
1221 resolved_method->signature()),
1222 selected_method->method_holder()->internal_name(),
1223 vtable_index
1224 );
1225 selected_method->access_flags().print_on(tty);
1226 if (selected_method->is_default_method()) {
1227 tty->print("default ");
1228 }
1229 if (selected_method->is_overpass()) {
1230 tty->print("overpass");
1231 }
1232 tty->cr();
1233 }
1234 // setup result
1235 result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
1236 }
1237
1238 void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
1239 Symbol* method_name, Symbol* method_signature, KlassHandle current_klass,
1240 bool check_access, bool check_null_and_abstract, TRAPS) {
1241 methodHandle resolved_method;
1242 linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
1243 runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
1244 }
1245
1246 // throws linktime exceptions
1247 void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name,
1248 Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
1249 // normal interface method resolution
1250 resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, true, CHECK);
1251
1252 assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
1253 assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
1254 }
1255
1256 // throws runtime exceptions
1257 void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
1258 Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
1259 // check if receiver exists
1260 if (check_null_and_abstract && recv.is_null()) {
1261 THROW(vmSymbols::java_lang_NullPointerException());
1262 }
1263
1264 // check if private interface method
1265 if (resolved_klass->is_interface() && resolved_method->is_private()) {
1266 ResourceMark rm(THREAD);
1267 char buf[200];
1268 jio_snprintf(buf, sizeof(buf), "private interface method requires invokespecial, not invokeinterface: method %s",
1269 Method::name_and_sig_as_C_string(resolved_klass(),
1270 resolved_method->name(),
1271 resolved_method->signature()));
1272 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1273 }
1274
1275 // check if receiver klass implements the resolved interface
1276 if (!recv_klass->is_subtype_of(resolved_klass())) {
1277 ResourceMark rm(THREAD);
1278 char buf[200];
1279 jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
1280 recv_klass()->external_name(),
1281 resolved_klass()->external_name());
1282 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
1283 }
1284
1285 // do lookup based on receiver klass
1286 methodHandle sel_method;
1287 // This search must match the linktime preparation search for itable initialization
1288 // to correctly enforce loader constraints for interface method inheritance
1289 lookup_instance_method_in_klasses(sel_method, recv_klass,
1290 resolved_method->name(),
1291 resolved_method->signature(), CHECK);
1292 if (sel_method.is_null() && !check_null_and_abstract) {
1293 // In theory this is a harmless placeholder value, but
1294 // in practice leaving in null affects the nsk default method tests.
1295 // This needs further study.
1296 sel_method = resolved_method;
1297 }
1298 // check if method exists
1299 if (sel_method.is_null()) {
1300 ResourceMark rm(THREAD);
1301 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1302 Method::name_and_sig_as_C_string(recv_klass(),
1303 resolved_method->name(),
1304 resolved_method->signature()));
1305 }
1306 // check access
1307 // Throw Illegal Access Error if sel_method is not public.
1308 if (!sel_method->is_public()) {
1309 ResourceMark rm(THREAD);
1310 THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
1311 Method::name_and_sig_as_C_string(recv_klass(),
1312 sel_method->name(),
1313 sel_method->signature()));
1314 }
1315 // check if abstract
1316 if (check_null_and_abstract && sel_method->is_abstract()) {
1317 ResourceMark rm(THREAD);
1318 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
1319 Method::name_and_sig_as_C_string(recv_klass(),
1320 sel_method->name(),
1321 sel_method->signature()));
1322 }
1323
1324 if (TraceItables && Verbose) {
1325 ResourceMark rm(THREAD);
1326 tty->print("invokeinterface selected method: receiver-class:%s, resolved-class:%s, method:%s, method_holder:%s, access_flags: ",
1327 (recv_klass.is_null() ? "<NULL>" : recv_klass->internal_name()),
1328 (resolved_klass.is_null() ? "<NULL>" : resolved_klass->internal_name()),
1329 Method::name_and_sig_as_C_string(resolved_klass(),
1330 resolved_method->name(),
1331 resolved_method->signature()),
1332 sel_method->method_holder()->internal_name()
1333 );
1334 sel_method->access_flags().print_on(tty);
1335 if (sel_method->is_default_method()) {
1336 tty->print("default ");
1337 }
1338 if (sel_method->is_overpass()) {
1339 tty->print("overpass");
1340 }
1341 tty->cr();
1342 }
1343 // setup result
1344 if (!resolved_method->has_itable_index()) {
1345 int vtable_index = resolved_method->vtable_index();
1346 assert(vtable_index == sel_method->vtable_index(), "sanity check");
1347 result.set_virtual(resolved_klass, recv_klass, resolved_method, sel_method, vtable_index, CHECK);
1348 } else {
1349 int itable_index = resolved_method()->itable_index();
1350 result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, itable_index, CHECK);
1351 }
1352 }
1353
1354
1355 methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
1356 KlassHandle resolved_klass,
1357 Symbol* method_name,
1358 Symbol* method_signature,
1359 KlassHandle current_klass,
1360 bool check_access) {
1361 EXCEPTION_MARK;
1362 methodHandle method_result;
1363 linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1364 if (HAS_PENDING_EXCEPTION) {
1365 CLEAR_PENDING_EXCEPTION;
1366 return methodHandle();
1367 } else {
1368 return method_result;
1369 }
1370 }
1371
1372 methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
1373 KlassHandle resolved_klass,
1374 Symbol* method_name,
1375 Symbol* method_signature,
1376 KlassHandle current_klass,
1377 bool check_access) {
1378 EXCEPTION_MARK;
1379 methodHandle method_result;
1380 linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
1381 if (HAS_PENDING_EXCEPTION) {
1382 CLEAR_PENDING_EXCEPTION;
1383 return methodHandle();
1384 } else {
1385 return method_result;
1386 }
1387 }
1388
1389 methodHandle LinkResolver::resolve_virtual_call_or_null(
1390 KlassHandle receiver_klass,
1391 KlassHandle resolved_klass,
1392 Symbol* name,
1393 Symbol* signature,
1394 KlassHandle current_klass) {
1395 EXCEPTION_MARK;
1396 CallInfo info;
1397 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1398 if (HAS_PENDING_EXCEPTION) {
1399 CLEAR_PENDING_EXCEPTION;
1400 return methodHandle();
1401 }
1402 return info.selected_method();
1403 }
1404
1405 methodHandle LinkResolver::resolve_interface_call_or_null(
1406 KlassHandle receiver_klass,
1407 KlassHandle resolved_klass,
1408 Symbol* name,
1409 Symbol* signature,
1410 KlassHandle current_klass) {
1411 EXCEPTION_MARK;
1412 CallInfo info;
1413 resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1414 if (HAS_PENDING_EXCEPTION) {
1415 CLEAR_PENDING_EXCEPTION;
1416 return methodHandle();
1417 }
1418 return info.selected_method();
1419 }
1420
1421 int LinkResolver::resolve_virtual_vtable_index(
1422 KlassHandle receiver_klass,
1423 KlassHandle resolved_klass,
1424 Symbol* name,
1425 Symbol* signature,
1426 KlassHandle current_klass) {
1427 EXCEPTION_MARK;
1428 CallInfo info;
1429 resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
1430 if (HAS_PENDING_EXCEPTION) {
1431 CLEAR_PENDING_EXCEPTION;
1432 return Method::invalid_vtable_index;
1433 }
1434 return info.vtable_index();
1435 }
1436
1437 methodHandle LinkResolver::resolve_static_call_or_null(
1438 KlassHandle resolved_klass,
1439 Symbol* name,
1440 Symbol* signature,
1441 KlassHandle current_klass) {
1442 EXCEPTION_MARK;
1443 CallInfo info;
1444 resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
1445 if (HAS_PENDING_EXCEPTION) {
1446 CLEAR_PENDING_EXCEPTION;
1447 return methodHandle();
1448 }
1449 return info.selected_method();
1450 }
1451
1452 methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, Symbol* name, Symbol* signature,
1453 KlassHandle current_klass) {
1454 EXCEPTION_MARK;
1455 CallInfo info;
1456 resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
1457 if (HAS_PENDING_EXCEPTION) {
1458 CLEAR_PENDING_EXCEPTION;
1459 return methodHandle();
1460 }
1461 return info.selected_method();
1462 }
1463
1464
1465
1466 //------------------------------------------------------------------------------------------------------------------------
1467 // ConstantPool entries
1468
1469 void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
1470 switch (byte) {
1471 case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
1472 case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
1473 case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
1474 case Bytecodes::_invokehandle : resolve_invokehandle (result, pool, index, CHECK); break;
1475 case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
1476 case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
1477 }
1478 return;
1479 }
1480
1481 void LinkResolver::resolve_pool(KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature,
1482 KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
1483 // resolve klass
1484 resolve_klass(resolved_klass, pool, index, CHECK);
1485
1486 // Get name, signature, and static klass
1487 method_name = pool->name_ref_at(index);
1488 method_signature = pool->signature_ref_at(index);
1489 current_klass = KlassHandle(THREAD, pool->pool_holder());
1490 }
1491
1492
1493 void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1494 KlassHandle resolved_klass;
1495 Symbol* method_name = NULL;
1496 Symbol* method_signature = NULL;
1497 KlassHandle current_klass;
1498 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1499 resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1500 }
1501
1502
1503 void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1504 KlassHandle resolved_klass;
1505 Symbol* method_name = NULL;
1506 Symbol* method_signature = NULL;
1507 KlassHandle current_klass;
1508 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1509 resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
1510 }
1511
1512
1513 void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
1514 constantPoolHandle pool, int index,
1515 TRAPS) {
1516
1517 KlassHandle resolved_klass;
1518 Symbol* method_name = NULL;
1519 Symbol* method_signature = NULL;
1520 KlassHandle current_klass;
1521 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1522 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1523 resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1524 }
1525
1526
1527 void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
1528 KlassHandle resolved_klass;
1529 Symbol* method_name = NULL;
1530 Symbol* method_signature = NULL;
1531 KlassHandle current_klass;
1532 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1533 KlassHandle recvrKlass (THREAD, recv.is_null() ? (Klass*)NULL : recv->klass());
1534 resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
1535 }
1536
1537
1538 void LinkResolver::resolve_invokehandle(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1539 assert(EnableInvokeDynamic, "");
1540 // This guy is reached from InterpreterRuntime::resolve_invokehandle.
1541 KlassHandle resolved_klass;
1542 Symbol* method_name = NULL;
1543 Symbol* method_signature = NULL;
1544 KlassHandle current_klass;
1545 resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
1546 if (TraceMethodHandles) {
1547 ResourceMark rm(THREAD);
1548 tty->print_cr("resolve_invokehandle %s %s", method_name->as_C_string(), method_signature->as_C_string());
1549 }
1550 resolve_handle_call(result, resolved_klass, method_name, method_signature, current_klass, CHECK);
1551 }
1552
1553 void LinkResolver::resolve_handle_call(CallInfo& result, KlassHandle resolved_klass,
1554 Symbol* method_name, Symbol* method_signature,
1555 KlassHandle current_klass,
1556 TRAPS) {
1557 // JSR 292: this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
1558 assert(resolved_klass() == SystemDictionary::MethodHandle_klass(), "");
1559 assert(MethodHandles::is_signature_polymorphic_name(method_name), "");
1560 methodHandle resolved_method;
1561 Handle resolved_appendix;
1562 Handle resolved_method_type;
1563 lookup_polymorphic_method(resolved_method, resolved_klass,
1564 method_name, method_signature,
1565 current_klass, &resolved_appendix, &resolved_method_type, CHECK);
1566 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1567 }
1568
1569
1570 void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
1571 assert(EnableInvokeDynamic, "");
1572
1573 //resolve_pool(<resolved_klass>, method_name, method_signature, current_klass, pool, index, CHECK);
1574 Symbol* method_name = pool->name_ref_at(index);
1575 Symbol* method_signature = pool->signature_ref_at(index);
1576 KlassHandle current_klass = KlassHandle(THREAD, pool->pool_holder());
1577
1578 // Resolve the bootstrap specifier (BSM + optional arguments).
1579 Handle bootstrap_specifier;
1580 // Check if CallSite has been bound already:
1581 ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
1582 if (cpce->is_f1_null()) {
1583 int pool_index = cpce->constant_pool_index();
1584 oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, CHECK);
1585 assert(bsm_info != NULL, "");
1586 // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
1587 bootstrap_specifier = Handle(THREAD, bsm_info);
1588 }
1589 if (!cpce->is_f1_null()) {
1590 methodHandle method( THREAD, cpce->f1_as_method());
1591 Handle appendix( THREAD, cpce->appendix_if_resolved(pool));
1592 Handle method_type(THREAD, cpce->method_type_if_resolved(pool));
1593 result.set_handle(method, appendix, method_type, CHECK);
1594 return;
1595 }
1596
1597 if (TraceMethodHandles) {
1598 ResourceMark rm(THREAD);
1599 tty->print_cr("resolve_invokedynamic #%d %s %s",
1600 ConstantPool::decode_invokedynamic_index(index),
1601 method_name->as_C_string(), method_signature->as_C_string());
1602 tty->print(" BSM info: "); bootstrap_specifier->print();
1603 }
1604
1605 resolve_dynamic_call(result, bootstrap_specifier, method_name, method_signature, current_klass, CHECK);
1606 }
1607
1608 void LinkResolver::resolve_dynamic_call(CallInfo& result,
1609 Handle bootstrap_specifier,
1610 Symbol* method_name, Symbol* method_signature,
1611 KlassHandle current_klass,
1612 TRAPS) {
1613 // JSR 292: this must resolve to an implicitly generated method MH.linkToCallSite(*...)
1614 // The appendix argument is likely to be a freshly-created CallSite.
1615 Handle resolved_appendix;
1616 Handle resolved_method_type;
1617 methodHandle resolved_method =
1618 SystemDictionary::find_dynamic_call_site_invoker(current_klass,
1619 bootstrap_specifier,
1620 method_name, method_signature,
1621 &resolved_appendix,
1622 &resolved_method_type,
1623 THREAD);
1624 if (HAS_PENDING_EXCEPTION) {
1625 if (TraceMethodHandles) {
1626 tty->print_cr("invokedynamic throws BSME for "INTPTR_FORMAT, (void *)PENDING_EXCEPTION);
1627 PENDING_EXCEPTION->print();
1628 }
1629 if (PENDING_EXCEPTION->is_a(SystemDictionary::BootstrapMethodError_klass())) {
1630 // throw these guys, since they are already wrapped
1631 return;
1632 }
1633 if (!PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1634 // intercept only LinkageErrors which might have failed to wrap
1635 return;
1636 }
1637 // See the "Linking Exceptions" section for the invokedynamic instruction in the JVMS.
1638 Handle nested_exception(THREAD, PENDING_EXCEPTION);
1639 CLEAR_PENDING_EXCEPTION;
1640 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
1641 }
1642 result.set_handle(resolved_method, resolved_appendix, resolved_method_type, CHECK);
1643 }
1644
1645 //------------------------------------------------------------------------------------------------------------------------
1646 #ifndef PRODUCT
1647
1648 void CallInfo::print() {
1649 ResourceMark rm;
1650 const char* kindstr = "unknown";
1651 switch (_call_kind) {
1652 case direct_call: kindstr = "direct"; break;
1653 case vtable_call: kindstr = "vtable"; break;
1654 case itable_call: kindstr = "itable"; break;
1655 }
1656 tty->print_cr("Call %s@%d %s", kindstr, _call_index,
1657 _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
1658 }
1659
1660 #endif